shell_tips:adding_multiple_users
This is an old revision of the document!
1. Example of how to add 50 users without password
$for usernum in {1..50}; do useradd -m user$usernum; done
2. You can generate passwords from the usernames
$for usernum in {1..50}; do useradd -m user$i; echo "user$usernum" | passwd --stdin user$usernum; done
3. You can also generate random passwords
$for usernum in {1..50}; do echo `</dev/urandom tr -dc a-z | head -c 10`|passwd --stdin user$usernum ;done
4. Add users with passwords, assign to sshd group, and copy a similar .bashrc to each home folder
$for usernum in {1..50}; do useradd -m user$usernum; echo "user$usernum" | passwd --stdin user$usernum; gpasswd -a "user$usernum" sshd; /bin/cp -f /home/user/.bashrc /home/"user$usernum";done
5. With random passwords
$for usernum in {1..50}; do useradd -m user$usernum; echo `</dev/urandom tr -dc a-z | head -c 10`|passwd --stdin user$usernum ; gpasswd -a "user$usernum" sshd; /bin/cp -f /home/user/.bashrc /home/"user$usernum";done
Note: We have used /bin/cp to escape cp alias in bash; this is usually on Centos
Delete users Remove the above users; including mailboxes and home folders
for usernum in {1..50}; do userdel -r -f user$usernum; done
shell_tips/adding_multiple_users.1344948222.txt.gz · Last modified: 2012/08/14 12:43 by ikahugu